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likoan [24]
2 years ago
14

Y=-3+1/2x

Mathematics
1 answer:
yarga [219]2 years ago
7 0

Answer:

(2, - 2 )

Step-by-step explanation:

y = - 3 + \frac{1}{2} x → (1)

3x + 2y = 2 → (2)

Substitute y = - 3 + \frac{1}{2} x into (2)

3x + 2(- 3 + \frac{1}{2} x) = 2 ← distribute parenthesis and simplify left side

3x - 6 + x = 2

4x - 6 = 2 ( add 6 to both sides )

4x = 8 ( divide both sides by 4 )

x = 2

Substitute x = 2 into (1)

y = - 3 + \frac{1}{2} (2) = - 3 + 1 = - 2

solution is (2, - 2 )

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At the movie theatre, child admission is $5.50 and adult admission is $8.60 . On Thursday, twice as many adult tickets as child
kirza4 [7]

Let child admissions be x and adult admissions be y. We can then use the information given to form a system of equations and solve that system.

The first equation is based on the information about the money made.

5.50x+8.60y=726.40

The second equation is based on the fact that twice as many adult tickets as child tickets were sold.

y = 2x

Since we have an equation equal to one of the variables, substitution will be the easiest way to solve this system. This is when we replace the variable of an equation with its value in the other.

5.50x+8.60y=726.40

5.50x+8.60(2x)=726.40

5.50x+17.2x = 726.40

22.7x = 726.40

x = 32

The number of children tickets sold was 32.

Extra:

To find the number of adult tickets can be found by plugging in the known value we found and solving for the other unknown.

y = 2x

y = 2(32)

y = 64

The number of adult tickets sold was 64.

7 0
4 years ago
A grain silo has a diameter of 4.4 meters. The height of its cylindrical portion is 6.2 meters.
erastova [34]
Volume of a cylinder = Height x base are
H = 6.2 m
Bae are = π.R² ; Diameter =4.4 m, then Radius = 2.2 m
Base area = π(2.2)²
And Volume=:
V= (6.2).(π,2.2²) = (6.2).(π)(.4.84) = 30.008.π ≈ 94.2 m³
4 0
3 years ago
Read 2 more answers
I REALLY NEED HELP!!!!!!!
Reil [10]
Do you think the answer is C.147?
3 0
3 years ago
Please help me asap really important
vichka [17]

Answer:

r = 3cm

h = 20cm

SA = 433.32cm^3

Step-by-step explanation:

If you use 3.14 for pi you will get 433.32.

Plz mark brainliest if this helped!!!

5 0
3 years ago
1:3, 9:28, 4:12, 2:6, 6:18 which one is the odd one out?
Montano1993 [528]

Answer:

9:28

Step-by-step explanation:

because the rest are equivalent to 1:3.

please mark as brainliest

3 0
3 years ago
Read 2 more answers
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